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Finding the Fourth Proportional to 245,919.04, 339,369.51 and 138,490.90

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Solution

The fourth proportional to 245,919.04, 339,369.51 and 138,490.90 is: 191,118.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,919.04 : 339,369.51 = 138,490.90 : x
  2. Step 2: Convert to fraction form
    245,919.04/339,369.51 = 138,490.90/x
  3. Step 3: Cross multiply
    245,919.04x = 339,369.51 × 138,490.90
  4. Step 4: Simplify right side
    245,919.04x = 46,999,588,543.38
  5. Step 5: Solve for x
    x = 46,999,588,543.38/245,919.04
  6. Step 6: Final answer
    x = 191,118.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.